a decrease in diameter and length of the shell
an increase in diameter and decrease in length of the shell
a decrease in diameter and increase in length of the shell
an increase in diamete
✅ The correct answer is option D.
Mechanical Engineering MCQs
A rotor supported at A and B carries two masses as shown in the below figure. The rotor is
dynamically balanced
statically balanced
statically and dynamically balanced
not balanced
✅ The correct answer is option C.
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
slow speed
moderate speed
highs peed
any one of these
✅ The correct answer is option C.
When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor.
Correct
Incorrect
✅ The correct answer is option A.
A draft tube is used with impulse turbines.
Yes
No
✅ The correct answer is option B.
The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
mild steel
copper
aluminium
brass
✅ The correct answer is option A.
In a thermal power plant, coal from the coal handling plant is moved to the boiler bunker through a
belt conveyor
bucket conveyor
fork lift truck
overhead crane
✅ The correct answer is option A.
The emissivity of a polished silver body is __________ as compared to black body.
same
low
very low
high
✅ The correct answer is option C.
A compound belt drive is used when
shafts are arranged parallel and rotate in the opposite directions
shafts are arranged parallel and rotate in the same directions
shafts are arranged at right angles and rotate in one definite direction
none of the above
✅ The correct answer is option D.
If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be
stable
unstable
isochronous
none of these
✅ The correct answer is option C.